"...they should also forfeit the vehicle they were in and any current and future vehicles that they might own."

So you would have the Courts seize property even if owned by another and merely driven by the offender, or owned by the driver but not involved in the incident, (scenarios a & b) and vehicles they haven't even purchased yet (scenario c)? Why should property not owned by the offender or involved in the incident be subject to forfeiture? Why would any convicted offender purchase a vehicle in the future if it was subject to forfeiture?

No, I don't typically let "anybody" drive my car, but that isn't the point. Your statement advocated forfeiture of cars without condition. If the offender was operating the car at the time of the offense, unconditional forfeiture-whether the car was owned by someone other than the driver/offender, whether it was another vehicle uninvolved in the incident but owned by the driver/offender or even those yet to be purchased by the driver/offender.

As for the issue of loaning a car; "willingly" allowing someone to drive your car does not inherently connote culpability for the loaner of the car. Unless you can demonstrate knowledge on the part of the person lending the car (i.e. negligent entrustment-they knew the driver was irresponsible/poor driver, inebriated, high, etc.) there will be no culpability on their part merely for lending the vehicle.

Pull the drivers license,auto tags,contact their insurance provider and suspend driving privileges
for one year..... the first time. And a stiff fine $2500. If the person violates any of this 14 days in the clinker.

The second time all of the above plus Friday,Saturday and Sunday sweeping our downtown sidewalks from 7AM - 7PM. Stiff fine $5,000 If the violator fails to report 14 days in the cell.

Took an untrodden path once, where the swift don’t win the race;
It goes to the worthy, who can divide the word of truth.
Took a stranger to teach me, to look into justice’s beautiful face,
and to see an eye for an eye and a tooth for a tooth.

If injuries aren't severe, such as paralysis, loss of limb, etc., loss of license for five years and minimum one years in jail. For severe injuries, five years in jail, permanent loss of license and some restitution. If victim(s) die, manslaughter one on each count, with no plea bargaining for lesser charge.